Erecting-mold for concrete structures.



C. WEBER.

EREOTING MOLD FOR concamnsmucwnns.

APPLICATION FILED OUT. 12, 1909.

' Patented Aug. 30, 1910.

B SHEETS-SHEET 1.

0. WEBER.

' EEBG'I'ING MOLD FOR CONCRETE STRUCTURES.

v mruonnm FILED 001.. 12, 1900. ggg ggg Patented Aug. 30, 1910.

6 SHEETS-SHEET 2 G. WEBER.

BBEGTING mom) FOR concama STRUCTURES.

APPLICATION FILED OUT. 12, 1909.

' Patented. Aug. 30, 1919.

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l 0.. WEBER.

'EBEGTING MOLD POE GONGBETE STBUCTUEES.

APPLIOATIOH FILED HOT. 12, 1909. 968,905, Patented Aug. 30, 1910.

, 6 SHEEN-SHEET 4.

62% vm n G. WEBER BEEGTING MOLD FOB. GONGRETE STRUCTURES.

Patented Aug. 30, 1910.

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APPLICATION FILED OCT. 12 1909.

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Z nae/535m C. WEBER.

EREGTING MOLD FOR GONCEETE STRUCTURES.

APPLIOATION FILED OUT. 12, 1909. 968,905. Patented Aug. 30, 1910.

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'unrrsn s'ra'rss cAn-L WEBER,

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IERECTING-MOLD Foa cones-urn srnucrusns.

To all whom it may, concern:

Be it known that I, Canal/Vanna, a citizen of the. United States, residing at Chicago,

in the county of Cook and State of Illinois, have invented a new and useful Improvement in Erecting-Molds for Concrete Structnres,'ot which the following is a specification.

In building circular concrete structures with the use of molds of the desired form and into which the green concrete is filled and tamped and left to set section after section being thus built. one upon the other to the height to be attained, it is common practice to employ molds of different diameters to correspond with the diameters of 'diiierent,structures or parts of structures to;

be erected by their use. Each mold is neces: sarily of unvarlable dlaineter even though it be, as is frequently the case, composed of arc shaped sections for convenience in handling it, since they are rigidly united. This condition of the art makes it necessary for a builder of such structures to keep on hand or provide many sizes of molds to enable I him to be equipped for erecting different diameters of structures he may be called upon to undertake. This requirement is objectionable for various reasons, principal among which are the expense incurred in constructing anoklnaintaining a large number of molds, ofwhich a considerable numbermay remain out of use for long periods and deteriorate with non-use, besides repre% "senting more or less dead capital thewin- "convenience and expense of shipping them.

be readily adaptable for use in erecting any cross-sectional dimens ons of structure.

My invention is particularly useful and Lliavefmore especially-devised it for the erection of upwardly-taperi ng ciroularstructures; of, molded concrete, rein orced con-v t-hough itmay be usedto advantage in the erection of polyggnial" and other forms of such structures; and'I havepriinarily devised it andpractically employed it in the Specification of Letters Patent. Application filed October 12, 1909. Serial no. 522,288

.tively, on the lines C-'G and DD', Fig. 3

tronI designate each ofthe two members bility to be damaged andpractically rained.

Y article.

"and insertib'le. It is also essential, to'obtain all the advantages of my invention,

ATENT cri ics.

or. CHICAGO, rrmnoisnssrcnon TO THE EBER CHIMNEY coiviranr, OF carcass, rumors, A conronarrron or ILLINOIS.

Patented ta so, rare.

cOnstructionof chimneys, or stacks involving the tapering shape referred to, in which application it is, therefore, illustrated .in the accompanying drawings, in which- .Figure 1 is a broken view in elevation of a concrete chimney undergoing erection with the use of molds of my improved con- .struction; Fig. 2 isa cross-sectional view of the same showing a' somewhat modified construction of the mold as used for the interior ofthe structure; Fig. 3 is a view in elevation, on a scale enlarged over that of the preceding figures, showing aportionof the outer mold equipped with means which I have devised" for readily tightening and loosening it and for holding its parts to gether; Figs..4 and 5 are sections taken, respectively, on lines AAiand Bf-B, Fig. 3; Figs. 6 and '7 are sections taken, res-pee Fig'L8 is a" vlew, showing byway of-a diagram, a bunch orlbundle of the staves" composing thebodyof the mold in their assemf bled relation but without any attachment details; Figi 9 is a broken View, but otherwise like that presented in F ig. 3, of the mold as used for the inside of the structure to cooperate with the outside mold, and Fig. 10 is an enlarged broken section on line EE,Fig.l. When,as is more usuallythe case, the'outside and inside molds? are used together, they, of course, pooperate toform the mold proper; but throughout the present descrip- 90 by the term mold ,',for the reason that each, an d particularly the outer one, may be used instances, as. for solid structures, separately and is ,"thusan independent Y i j i It -isan essentially. characteristic feature f of my improved jmoldfthatdtshall cOIilprise, as'to its body-portion, flexibly-united sections that are independently removable when used for erecting a structure of; circular and tapering shape, requiring the I ,inolol to be of corresponding shape, that i crete, or snnilar material, in connectlon with wlhch'fits advantages are most pronounced,

the bottom and top of the mold. These Fla structures, as chimneys or stacks, are commonly erected in successive sections built? the mold shall adapt it to form a circle re duced in circumference at its base and top to conform to the taper of the new section to be molded in it. The tapering shape of the mold is produced by wedge-shaped sections, of proper dimensions assembled with the other sections, each of which latter is of uniform width throughout its length; and it is preferred to have the aforesaid wedgelike sections or reducers each tapered along both edges and to divide or distribute the difference between the circumference of the lower end of the mold and that of its upper end among aplurality of the reducers, twelve of which are preferably used in any mold of ordinary size for my particular pur-,

pose. If, therefore, the taper desired in a chimney be that of one inch difierence between the lower and upper ends of each molded section thereof, the width of each unit of the mold that may be required to be removed therefrom is 3.1-l inches; if the standard be one and one-fourth inches, the width of the unit is 3.93, and if the standard be one and one-half inches, then afilinches is the width of the unit, and so on.

V denotes the outer mold, \V the inner mold'and X a (oncrete upwardly-tapering chimney undergoing erection by their use. The mold V is composed of a plurality of staves or sections 11, of metal or wood, each of a width throughout its length of pi times the difference between the lower and upper ends of the complete mold to constitute it a'unit, and a plurality (preferably twelve) of somewhat wider and similar staves or sections 12, each tapered upwardly along both edges to an extent to distribute among them all the degree of taper required to produce the desired difference in circumference between the lower and upper ends of the complete mold. All the sections should be of uniform length and thickness Each section 11 is provided rigidly on its lower end with a'metal clip 13 having a tongue 14 extending from one end, a tongue 15 eX-- tending from its opposite end and an ofiset- 11p 16 extending from its lower end, with a hook 17 and a stop 17 projecting from its face. These clips are shownto be fastened in place by screws through perforations in them, and the lips 16 form sockets for the purpose hereinafter explained. Another clip 18 is provided, and shown to be fas tened like the clips 13, on the upper end of each stave or section and is formed with two arms 19 and 20 extending at rightangles to each other, a third arm 21 extending opposite to and parallel with the arm 20, and a hook on the lower end having a transverse opening 23 througlrits baseportion for the passage of a wire suspensionrope For releasablyifastening the sections together to form the outer mold means are shown to be provided of which the following is a description: One of the sections 12 has rigidly secured to it hear each end of its outer face by a bolt 2st (Fig. 4) a metal head 25 containing at opposite sides of its vertical center apertures or passages 26, 27 (Fig. 7) and having formed with it a segment 28 provided with a rope-receiving groove in its edge... Along this same stave extend, parallel with each other, two similar bars 29 and 30, of T-shape in cross-section, with their ends confined in alining sockets in the opposite heads 25 and performing the guiding purpose hereinafter explained. Threaded rods or screw-shafts 31 and 32, each having an angular upper end at 33 for the application of a. suitable wrench by which to turn it, pass through the apertures at 26, 27, in the upper head 25 into those of the' lower head, and they are confined against longitudinal movement through the- 31 and 32-, respectively, these" nuts being alike and each having a rear socket 37 (Fig. (3), to loosely fit one of the guiding T-bars, and being formed with a laterally and outwardly extending fork or notch 38.

To form a mold V, the sections are assembled by stringing a rope 123 through the opening 23 of each of a number (as seven) of the sections 11 to form a bunch of sections for readily handling and abutting said bunches edgewise together in proper succession, this being done at the place of erection; and the tongues ltand 15 on each lower clip 13 overlap and form guides in alining with the section carrying such clip the sections flanking it, while the tongues 20 and 21 of the clips 18 on the upper ends of the sections serve the same purpose. WVith the sec: tions thus assembled to form a ring of desired diameter, ropes or cables 39 and 40, each provided on one end with a stop-head 41 whence it passes through a suitable open ing in the segment-member 28 of a head 25, are wound, respectively, about the clips 13, at which the cable 39 is laid in the hooks 17 to be confined against jumping out by the lugs 17*, and about the clips 18, the cable 40 being laid in the hooks 22 adjacent. to which lugs 17 are provided for the purpose stated of the lugs 17% The nee endof the cable 39 is passed aboi'lt' t'lie grd'oved segment the lower head '25',*f0i-" uiding it, andis iii; troduccd into tlie 'notc'h or fork 38' of the bcyond'which treat-ties ri'idly ai'stopf button and theffreeiid o" the rope lflj is similarly passed *aboutthe g'rooy'e'd, scg i ment on the upper head 25 and 1nto" the "notch 38 of tl ie'nut"35,'bey0nd whichitalso carries a stop-'button lfi Thns, turningthe screw 32 at its end33'in'ohe direction works the nut 36 upwardly to strain the cable 39 about the mold and -tigditen' the sections in their assembled relation, while similarly turning the screw 31t0r'ces the nut d0wnwardly to eXert a similar eitect on the rope and to loosen the mold-sections the rods are turned in the opposite direction, such loosening permitting the ropes tobe'readily.

pulled out of thenotche's 38 to permit the mold to be taken apart.

lhe construction of the inner mold does not (litter greatly from that of the puler mold. Like the latter, its bodysportion is formed of sections 11 and 12 respectively, similar to and for the same purposes as the sections 11 and 12, though no such tightening-means are provided as on the outer mold. The clips 13 on the lower inner faces of thesection-ends are, substantially, like the clips 13 in being formed with tongues ll and 15 to overlap adjacent sections, and with offset lips 16 on their lower ends; but each is furthermore provided between its upper and lower ends with an in wardlypro ecting ledge or shelf &3. The

clips 18 on the upper ends of these lastnamed sections are very much like the clips 18, being formed with tongues 19, 20- and 21. and with hooks 22, like but larger than the hooks 22 and containing in their baseportions transverse openings 23 for the passage of a suspension'rope 123 used for stringing a number'of the sections together into a bunch. 1

To form the mold the sections are assembled in bunches in the manner described of the outer mold and they are rendered stable in their ring-forming relation by a metal hoop 14 seated edgcwise in the hooks 22*. This ho'op. is shown to be provided, as preferred, in arc-shape sections resting at their ends in adjacent hooks with the ends of successive hoop-sections overlapping each other and requiring to be (lIlW I into their seating-hooks to tighten them in place by friction. The ledges 43 form supports for platformdooards 4-5 (lig. 2) provided for theworkmen inside the structure in the progre of its erection.

After the first or base section of a chimney X has been formed by filling and tamping concrete between the molds V and W, two other molds, respectively similar to them but each with a unit 11, 11

i bbdy portibnto prbper'ly reduce its circumt'erence, are placed on the base-sect on, be-

i isec'urejd as-describedr ot the first set-of molds, rheionvuesfre i-Dfi'the clips 18 of the first mold "lfjfentcnthe lips 16 offthe clipsli13 "of the second outer 'mold .to interlfck the two molds, andin the same way and for they samepurpo'se the tongues 19 oii tlie lower vinnerjjin'old N en age the lips =16 dflll e second inner niol The free ends of the ro'pes123 of'section-bunches in the lowermostouter mold V. are looped, each, about a projecting tongue 19f ot a clip 18, the ropeTofcthe section 1:2 carrying the tightening vmeehanis n extending from an eye edfastenedby the bolt 24: to the upper headi25, and the. ropes 1.23 are similarly looped about thevtongues. 19 of the clips 18 on the second inner mold. This dis osition of the rope-ends servesto suspen the bunches of, sections connected by them when the tightening means of the lowermost outer mold and the hoop of the corresponding inner mold are released to free the sections, and thus to facilitate the, operation by the workmen of raising the lower molds for use in forming upper sections of the chimney. When the secondchimney-section has been molded and the concrete thercoi has set, the.

members of the first or lowermost set of molds heave their sections (in bunches) freed 1n the manner described, whereupon the workmen lift them by the suspensionropes to the top of that section and adjust them in place for-molding the third section, upon removing from each mold two of its contained units to cause the newly-placed molds to conform to the'dimensions and shape of the chimney-section next to be molded, after completion and setting of which the molds used for forming the second chimney-section are similarly used to form the fourth section; and this procedure is carried on until the desired height of the chimney has been attained, the were being greatly facilitated not only by tlie construction of the molds but by the ease with which they are adapted to be elevated to the difier- 2. An erecting-mold for structures of the character. described, comprising a body-pori tion forming a tapering ring composed of a plurality Jr withdrawablc secions constituting units, the width of oaclinnit being less 111 its A pi'tnncs the dimensional difference between 13 the opposite ends of the mold, and a pinrality of sections tapered longitudinally to distribute their combined Width of taper throughout said bodyportion.

3. An erecting-mold for structures of the character described, comprising a body-portion composed of ilexibly-connected sections, each of a plurality of the sections being withdrawable from the body-portion to reduce its size, ropes surrounding said bodyportion near its opposite ends and each secured at one end, and means for releasably tightening each rope, comprising heads near opposite ends of said body-portion and provided with rope-guides, guide-bars extending between said heads, screw-shafts working in said heads and confined against longitudinal movement, and nuts on said screwbars in which the r0pe-ends are releasably fastened, said nuts engaging said bars to be guided thereby.

4. An erecting-mold for structures of the character described, comprising a body-por tion composed of flexibly-connected sections, each of a plurality of the sections being withdrawahle from the body-portion to 'reduce its size, ropes surrounding said bodyportion near its opposite ends and each secured at one end, and means for releasably 5. An erecting-mold for structures of the character described, comprising a body-portion forming a tapering ring composed ot a plurahty of withdrawable sections constitilting units, the width of each unit being pi times the dimensional difference between the opposite ends of the mold, and a plurality of longitudinally tapering sections, clips on opposite ends of said sections having hooks, ropes fastened at. one end and sin-rounding the body-portion under confinement in said hooks, and tightening means for each rope on the body-portion operative at the upper end of the mold.

CARL \VEBER.

-[n presence of CHAS. E. GAYLORD, RALPH A. SCHAEFER. 

